scenario_grille_carre.py

#!/usr/bin/env python
# -*- coding: utf8 -*-

"""

Dans une grille en tore (pacman) privilégie les co-linéarités à angle droit.


"""
import elasticite as el
import numpy as np
class EdgeGrid(el.EdgeGrid):
    def champ(self):
        force = np.zeros_like(self.lames[2, :])
        damp = lambda t: 0.001
        noise = lambda t: 2* np.exp((np.cos(2*np.pi*(t-0.) / 6.)-1.)/ 1.**2)
        colin_t = lambda t: -2.*np.exp((np.cos(2*np.pi*(t-4.) / 6.)-1.)/ 1.**2)
        colin_d = lambda d: np.exp(-d/.05)
        #colin_d = lambda d: -1. + 2*np.exp(-np.log((d+1.e-12)/.1)**2/2/1.5**2)
        delta_angle = self.angle_relatif()-np.pi/2.
        #delta_angle *= np.sign(delta_angle)
        force += colin_t(self.t) * np.sum(np.sin(4*delta_angle)*colin_d(self.distance(do_torus=True)), axis=1)
        force += noise(self.t)*np.pi*np.random.randn(self.N_lame)
        force -= damp(self.t) * self.lames[3, :]/self.dt
        return 1. * force

if __name__ == "__main__":
    import sys
    if len(sys.argv)>1: mode = sys.argv[1]
    else: mode = 'both'
    e = el.EdgeGrid(N_lame=72, mode=mode, verb=False)
    el.main(e)